Pointer-type Angle Measuring Device with Wireless Power Supply for Lighting

ABSTRACT

The invention belongs to the field of measuring tools, particularly relates to a pointer-type angle measuring device with wireless power supply for lighting for measuring angle state of an object. The invention includes a housing, a dial, a pointer and an electronic circuit. Wherein, the electronic circuit includes a wireless power supply circuit and a wireless power receiving and lighting circuit, and the wireless power receiving and lighting circuit is set on the pointer. The invention is characterized in that the pointer can illuminate, and the invention is convenient for people to use in a low light environment, to measure angle of the object.

CROSS-REFERENCE TO RELATED PATENT APPLICATION

The present patent application claims benefit of Chinese patentapplication No. 201410432033.3 filed on Aug. 29, 2014, the entirecontents of which are incorporated by reference.

TECHNICAL FIELD

The invention belongs to the field of measuring tools, particularlyrelates to a pointer-type angle measuring device with wireless powersupply for lighting for measuring and correcting horizontal, vertical,45 degree and other angle state of an object.

BACKGROUND

It is needed to measure and correct horizontal, vertical and other anglestate of an object during operation processes such as house decoration,maintenance, item installation, etc. The pointer in the existingpointer-type angle measuring device has no lighting function, and leadto inconvenient in measuring and correction of horizontal, vertical andother angle states of objects in a low light environment.

SUMMARY

Against the disadvantages in that because the pointer has no lightingfunction, the existing pointer-type angle measuring device isinconvenient to measure angle in a low light environment, the inventionprovide a pointer-type angle measuring device with wireless power supplyfor lighting, and brings convenience for people to measure and correcthorizontal, vertical and other angle states of objects in a low lightenvironment.

The technical schemes adopted in the invention are achieved as follows:a pointer-type angle measuring device with wireless power supply forlighting, which includes a housing, a dial, a pointer and an electroniccircuit, wherein, the electronic circuit includes a wireless powersupply circuit and a wireless power receiving and lighting circuit, andthe wireless power receiving and lighting circuit is set on the pointer.

In the pointer-type angle measuring device with wireless power supplyfor lighting, the housing consists of a front cover and a rear cover, awindow is set in the front cover, a transparent cover is set on thewindow of the front cover, and the pointer is set in an inner cavity ofthe housing inside of the transparent cover.

In the pointer-type angle measuring device with wireless power supplyfor lighting, the pointer consists of a pointer body and a pointer head,the pointer body is a housing structure with an inner cavity, thepointer head of the pointer is made of a transparent material.

In the pointer-type angle measuring device with wireless power supplyfor lighting, the wireless power supply circuit includes a powertransmitter coil and a circuit board of the wireless power supplycircuit, a power transmitter coil fixing base is set on the inner sideof the rear cover, the power transmitter coil is fixed on powertransmitter coil fixing base, and the power transmitter coil isconnected with the circuit board in the wireless power supply circuitthrough a wire.

In the pointer-type angle measuring device with wireless power supplyfor lighting, the wireless power receiving and lighting circuit includesa power receiver coil, a second light emitting diode for lighting of thepointer head and a circuit board in the wireless power receiving andlighting circuit, a power receiver coil fixing base is set on the backof the pointer body, and the power receiver coil is fixed on the powerreceiver coil fixing base.

In the pointer-type angle measuring device with wireless power supplyfor lighting, a shaft hole is set in the middle of the power receivercoil fixing base for communicating with the pointer body, a bearing ismounted in the shaft hole in the middle of the pointer body and thepower receiver coil fixing base, a main shaft is mounted in a bearinghole of the bearing, one end of the main shaft is fixed on thetransparent cover, the other end of the main shaft is fixed on the rearcover, and the pointer can rotate around the main shaft as the axis.

In the pointer-type angle measuring device with wireless power supplyfor lighting, a level bubble is set in the inner cavity of the pointerbody, a level bubble window is set in the front surface of the pointerbody of the pointer, and the level bubble window is located above thecircuit board in the wireless power receiving and lighting circuit.

In the pointer-type angle measuring device with wireless power supplyfor lighting, the dial is circular, the dial is set on the outer edge ofthe window in the front cover in the inner cavity of the housing insideof the transparent cover, a circular light emitting diode fixing ring isset on the back of the dial, and a first light emitting diode is set onthe light emitting diode fixing ring.

In the pointer-type angle measuring device with wireless power supplyfor lighting, the wireless power supply circuit includes a microcomputerprocessor IC₁, a wireless transmitting circuit, an LED driving circuit,an energy-saving circuit and a power circuit.

In the pointer-type angle measuring device with wireless power supplyfor lighting, the microcomputer processor IC₁ is HT48R063B microcomputerprocessor.

In the pointer-type angle measuring device with wireless power supplyfor lighting, the wireless transmitting circuit includes a triode Q, atransmitter coil L₁, a capacitor 5 C₅, a resistor 2 R₂ and a resistor 3R₃, wherein one end of the resistor 2 R₂ is connected with the pin 2 ofthe microcomputer processor IC₁, the other end of the resistor 2 R₂ isconnected with a base electrode of the triode Q, the collector electrodeof the triode Q is serially connected with the transmitter coil L₁ andthe capacitor 5 C₅ in turn, the other end of the capacitor 5 C₅ isgrounded, a node between the transmitter coil L₁ and the capacitor 5 C₅is connected to the power supply voltage VCC of the circuit, an emitterelectrode of the triode Q is connected with one end of the resistor 3R₃, and the other end of the resistor 3 R₃ is grounded.

In the pointer-type angle measuring device with wireless power supplyfor lighting, the LED driving circuit includes a resistor 7 R₇, aresistor 8 R₈, a resistor 9 R₉, a resistor 10 R₁₀ and a first lightemitting diode, wherein, the first light emitting diode consists of alight emitting diode 1 LED₁, a light emitting diode 2 LED₂, a lightemitting diode 3 LED₃ and a light emitting diode 4 LED₄, all anodes ofthe light emitting diode 1 LED₁, the light emitting diode 2 LED₂, thelight emitting diode 3 LED₃ and the light emitting diode 4 LED₄ areconnected to the power supply voltage VDD of the circuit, cathodes ofthe light emitting diode 1 LED₁, the light emitting diode 2 LED₂, thelight emitting diode 3 LED₃ and the light emitting diode 4 LED₄ arerespectively connected with one end of the resistor 7 R₇, the resistor 8R₈, the resistor 9 R₉ and the resistor 10 R₁₀, and the other end of theresistor 7 R₇, the resistor 8 R₈, the resistor 9 R₉ and the resistor 10R₁₀ are respectively connected with pin 4, pin 3, pin 1 and pin 16 ofthe microcomputer processor IC₁.

In the pointer-type angle measuring device with wireless power supplyfor lighting, the energy-saving circuit includes a capacitor 1 C₁, acapacitor 4 C₄, a resistor 1 R₁, a resistor 11 R₁₁ and a start switchSK, wherein, the capacitor 1 C₁ is an electrolytic capacitor, the anodeof the capacitor 1 C₁ is connected with one end of the resistor 11 R₁₁and the power supply voltage VCC of the circuit, the cathode of thecapacitor 1 C₁ is grounded and connected with one end of the resistor 11R₁₁, one end of the capacitor 4 C₄ and one end of the resistor 1 R₁, theother end of the capacitor 4 C₄ is connected with one end of the startswitch SK and the pin 7 of the microcomputer processor IC₁, the otherend of the start switch SK is connected with the other end of theresistor 1 R₁;

The power circuit includes a parallel voltage-stabilizing integratedcircuit IC₂, a capacitor 2 C₂, a capacitor 3 C₃, a resistor 4 R₄, aresistor 5 R₅, a resistor 6 R₆ and a resistor 12 R₁₂, wherein, thecapacitor 2 C₂ is an electrolytic capacitor, the cathode of thecapacitor 2 C₂ is grounded and connected with the pin 5 of themicrocomputer processor IC₁, one end of the capacitor 3 C₃, the anode ofthe parallel voltage-stabilizing integrated circuit IC₂, one end of theresistor 5 R₅ and one end of the resistor 6 R₆, the power supply voltageVDD in the circuit is connected to the anode of the capacitor 2 C₂, thepin 13 of the microcomputer processor IC₁, the pin 12 of themicrocomputer processor IC₁, the other end of the capacitor 3 C₃, thecathode of the parallel voltage-stabilizing integrated circuit IC₂, oneend of the resistor 4 R₄, one end of the resistor 6 R₆ and one end ofthe resistor 12 R₁₂, the other end of the resistor 4 R₄ is connectedwith the other end of the resistor 5 R₅ and a reference electrode of theparallel voltage-stabilizing integrated circuit IC₂, and the other endof the resistor 12 R₁₂ is connected to the power supply VCC in thecircuit.

In the pointer-type angle measuring device with wireless power supplyfor lighting, wireless power receiving and lighting circuit includes apower receiver coil L₂, a capacitor 6 C₆ and a second light emittingdiode, wherein, the second light emitting diode consists of a lightemitting diode 5 LED₅ and a light emitting diode 6 LED₆, the cathode ofthe light emitting diode 5 LED₅ is connected with the anode of the lightemitting diode 6 LED₆, the anode of the light emitting diode 5 LED₅ isconnected with one end of the power receiver coil L₂ and one end of thecapacitor 6 C₆, the cathode of the light emitting diode 6 LED₆ isconnected with the other end of the power receiver coil L₂ and the otherend of the capacitor 6 C₆.

Operating principles of the pointer-type angle measuring device withwireless power supply for lighting of the invention are as follows: thefirst light emitting diode consisting of the light emitting diode 1LED₁, the light emitting diode 2 LED₂, the light emitting diode 3 LED₃and the light emitting diode 4 LED₄ is connected to the LED drivingcircuit in the wireless power supply circuit through a lead, forlighting the dial. The wireless transmitting circuit in the wirelesspower supply circuit, microcomputer processor IC₁, etc. generatetransmission signals and transmits the signals to the power receivercoil L₂ through the power transmitter coil L₁, to allow the powertransmitter coil L₁ to transmit power outwards, the power receiver coilL₂ is responsible for non-contact receiving the power transmitted by thepower transmitter coil L₁ and lighting the second light emitting diodeon the circuit board in the wireless power receiving and lightingcircuit, and the second light emitting diode irradiates the pointer headof the pointer, thus achieving lighting without power lead connection.No matter what angle the datum level of the pointer-type angle measuringdevice with wireless power supply for lighting is tilted to, the pointercan always point to the position right above by gravity action ofitself. Because the dial is fixed on the transparent cover and rotateswith the rotation of the pointer-type angle measuring device withwireless lighting, when the rotation angle of the pointer-type anglemeasuring device with wireless lighting is determined, the angle in thedial that the pointed points to is the angle that the pointer-type anglemeasuring device with wireless lighting is tilted to.

Compared to the existing angle measuring device, the pointer-type anglemeasuring device with wireless power supply for lighting of theinvention has characteristics in that the pointer can illuminate, andthe pointer-type angle measuring device with wireless power supply forlighting of the invention can be used alone or in combination with atraditional measuring device such as spirit level. It is convenient forpeople to use the pointer-type angle measuring device with wirelesspower supply for lighting of the invention to measure and correcthorizontal, vertical and other angle state of an object in a low lightenvironment.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an appearance representation of the pointer-type anglemeasuring device with wireless power supply for lighting of theinvention.

FIG. 2 is a structural representation of the pointer-type anglemeasuring device with wireless power supply for lighting of theinvention.

FIG. 3 is an appearance representation of the pointer.

FIG. 4 is a structural representation of the pointer.

FIG. 5 is a circuit diagram of the electronic circuit of thepointer-type angle measuring device with wireless power supply forlighting of the invention.

In FIG. 1-FIG. 5, wherein:

1: front cover; 2: dial; 3: pointer; 3 a: pointer body; 3 a 1: levelbubble window; 3 b: pointer head; 3 c: level bubble; 3 d: bearing; 3 e:main shaft; 3 f: power receiver coil fixing base; 4: transparent cover;5: light emitting diode fixing ring; 6: rear cover; 7: power transmittercoil fixing base; 8: wireless power supply circuit; 801: wirelesstransmitting circuit; 802: LED driving circuit; 803: energy-savingcircuit; 804: power circuit; 8 a: power transmitter coil; 8 b: circuitboard in the wireless power supply circuit; 8 c: first light emittingdiode; 8 d: lead; 9: wireless power receiving and lighting circuit; 9 a:power receiver coil; 9 b: circuit board in the wireless power receivingand lighting circuit; 9 c: second light emitting diode; 10: datum level;IC₁: microcomputer processor; IC₂: parallel voltage-stabilizingintegrated circuit; Q: triode; LED₁: light emitting diode 1; LED₂: lightemitting diode 2; LED₃: light emitting diode 3; LED₄: light emittingdiode 4; LED₅: light emitting diode 5; LED₆: light emitting diode 6; C₁:capacitor 1; C₂: capacitor 2; C₃: capacitor 3; C₄: capacitor 4; C₅:capacitor 5; C₆: capacitor 6; L₁: power transmitter coil; L₂: powerreceiver coil; R₁: resistor 1; R₂: resistor 2; R₃: resistor 3; R₄:resistor 4; R₅: resistor 5; R₆: resistor 6; R₇: resistor 7; R₈: resistor8; R₉: resistor 9; R₁₀: resistor 10; R₁₁: resistor 11; R₁₂: resistor 12;and SK: start switch.

DETAILED DESCRIPTION

By reference to drawings, the invention will be further described byexamples below.

Referring to FIG. 1-FIG. 5, a pointer-type angle measuring device withwireless power supply for lighting, includes a housing, a dial 2, apointer 3 and an electronic circuit. Wherein, the electronic circuitincludes a wireless power supply circuit 8 and a wireless powerreceiving and lighting circuit 9, and the housing consists of a frontcover 1 and a rear cover 6. A window is set in the front cover 1, atransparent cover 4 is set on the window of the front cover 1, and thepointer 3 is set in an inner cavity of the housing inside of thetransparent cover 4, the pointer 3 consists of a pointer body 3 a and apointer head 3 b, and the pointer body 3 a is a housing structure withan inner cavity. A level bubble 3 c is set in the inner cavity of thepointer body 3 a, and a level bubble window 3 a 1 is set in the frontsurface of the pointer body 3 a of the pointer 3. The pointer head 3 bof the pointer 3 is made of a transparent material. The wireless powersupply circuit 8 includes a power transmitter coil 8 a and a circuitboard 8 b in the wireless power supply circuit, wherein, a powertransmitter coil fixing base 7 is set on the inner side of the rearcover 6, the power transmitter coil 8 a is fixed on power transmittercoil fixing base 7, and the power transmitter coil 8 a is connected withthe circuit board 8 b in the wireless power supply circuit through awire 8 d. The wireless power receiving and lighting circuit 9 includes apower receiver coil 9 a, a second light emitting diode 9 c for lightingof the pointer head 3 b and a circuit board 9 b in the wireless powerreceiving and lighting circuit, wherein, a power receiver coil fixingbase 3 f is set on the back of the pointer body 3 a, and the powerreceiver coil 9 a is fixed on the power receiver coil fixing base 3 f. Ashaft hole is set in the middle of the power receiver coil fixing base 3f for communicating with the pointer body 3 a, a bearing 3 d is mountedin the shaft hole in the middle of the pointer body 3 a and the powerreceiver coil fixing base 3 f, a main shaft 3 e is mounted in a bearinghole of the bearing 3 d, one end of the main shaft 3 e is fixed on thetransparent cover 4, the other end of the main shaft 3 e is fixed on therear cover 6, and the pointer 3 can rotate around the main shaft 3 e asthe axis. The circuit board 9 b in the wireless power receiving andlighting circuit is set below the pointer head 3 b in the inner cavityof the pointer body 3 a and the level bubble window 3 a 1. The dial 2 iscircular, the dial 2 is set on the outer edge of the window in the frontcover 1 in the inner cavity of the housing inside of the transparentcover 4, a circular light emitting diode fixing ring 5 is set on theback of the dial 2, and a first light emitting diode 8 c is set on thelight emitting diode fixing ring 5. The datum level 10 of thepointer-type angle measuring device with wireless power supply forlighting is set on the bottom.

In the pointer-type angle measuring device with wireless power supplyfor lighting, the wireless power supply circuit 8 consists of amicrocomputer processor IC₁, a wireless transmitting circuit 801, an LEDdriving circuit 802, an energy-saving circuit 803 and a power circuit804, wherein:

The microcomputer processor IC₁ is HT48R063B microcomputer processor.Control software of the pointer-type angle measuring device withwireless power supply for lighting of the invention is set in themicrocomputer processor IC₁ in advance to control the electronic circuitin this invention.

The wireless transmitting circuit 801 includes a triode Q, a transmittercoil L₁, a capacitor 5 C₅, a resistor 2 R₂ and a resistor 3 R₃, whereinone end of the resistor 2 R₂ is connected with the pin 2 of themicrocomputer processor IC₁, the other end of the resistor 2 R₂ isconnected with a base electrode of the triode Q. A collector electrodeof the triode Q is serially connected with the transmitter coil L₁ andthe capacitor 5 C₅ in turn, the other end of the capacitor 5 C₅ isgrounded. A node between the transmitter coil L₁ and the capacitor 5 C₅is connected to the power supply voltage VCC of the circuit, an emitterelectrode of the triode Q is connected with one end of the resistor 3R₃, and the other end of the resistor 3 R₃ is grounded.

The LED driving circuit 802 includes a resistor 7 R₇, a resistor 8 R₈, aresistor 9 R₉, a resistor 10 R₁₀ and a first light emitting diode 8 c,wherein, the first light emitting diode 8 c consists of a light emittingdiode 1 LED₁, a light emitting diode 2 LED₂, a light emitting diode 3LED₃ and a light emitting diode 4 LED₄. All anodes of the light emittingdiode 1 LED₁, the light emitting diode 2 LED₂, the light emitting diode3 LED₃ and the light emitting diode 4 LED₄ are connected to the powersupply voltage VDD of the circuit. Cathodes of the light emitting diode1 LED₁, the light emitting diode 2 LED₂, the light emitting diode 3 LED₃and the light emitting diode 4 LED₄ are respectively connected with oneend of the resistor 7 R₇, the resistor 8 R₈, the resistor 9 R₉ and theresistor 10 R₁₀, and the other end of the resistor 7 R₇, the resistor 8R₈, the resistor 9 R₉ and the resistor 10 R₁₀ are respectively connectedwith pin 4, pin 3, pin 1 and pin 16 of the microcomputer processor IC₁.

The energy-saving circuit 803 includes a capacitor 1 C₁, a capacitor 4C₄, a resistor 1 R₁, a resistor 11 R₁₁ and a start switch SK, wherein,the capacitor 1 C₁ is an electrolytic capacitor, the anode of thecapacitor 1 C₁ is connected with one end of the resistor 11 R₁₁ and thepower supply voltage VCC of the circuit, the cathode of the capacitor 1C₁ is grounded and connected with the other end of the resistor 11 R₁₁.One end of the capacitor 4 C₄ and one end of the resistor 1 R₁, theother end of the capacitor 4 C₄ is connected with one end of the startswitch SK and the pin 7 of the microcomputer processor IC₁, the otherend of the start switch SK is connected with the other end of theresistor 1 R₁. The energy-saving circuit 803 can cooperate with themicrocomputer processor IC₁ to achieve energy-saving function; if usersforget to turn off the power supply after using the pointer-type anglemeasuring device with wireless power supply for lighting of theinvention, the microcomputer processor IC₁ can turn off the power supplyfor the LED driving circuit 802 and the wireless transmitting circuit801, thus achieving the goal of energy saving.

The power circuit 804 includes a parallel voltage-stabilizing integratedcircuit IC₂, a capacitor 2 C₂, a capacitor 3 C₃, a resistor 4 R₄, aresistor 5 R₅, a resistor 6 R₆ and a resistor 12 R₁₂, wherein, thecapacitor 2 C₂ is an electrolytic capacitor, the cathode of thecapacitor 2 C₂ is grounded and connected with the pin 5 of themicrocomputer processor IC₁, one end of the capacitor 3 C₃, the anode ofthe parallel voltage-stabilizing integrated circuit IC₂, one end of theresistor 5 R₅ and one end of the resistor 6 R₆, the anode of thecapacitor 2 C₂, the pin 13 of the microcomputer processor IC₁, the pin12 of the microcomputer processor IC₁, the other end of the capacitor 3C₃, the cathode of the parallel voltage-stabilizing integrated circuitIC₂, one end of the resistor 4 R₄, one end of the resistor 6 R₆ and oneend of the resistor 12 R₁₂ are connected to the power supply voltage VDDin the circuit, the other end of the resistor 4 R₄ is connected with theother end of the resistor 5 R₅ and a reference electrode of the parallelvoltage-stabilizing integrated circuit IC₂, and the other end of theresistor 12 R₁₂ is connected to the power supply VCC of the circuit.

In the pointer-type angle measuring device with wireless power supplyfor lighting, the wireless power receiving and lighting circuit 9includes a power receiver coil L₂, a capacitor 6 C₆ and a second lightemitting diode 9 c, wherein, the second light emitting diode consists ofa light emitting diode 5 LED₅ and a light emitting diode 6 LED₆, thecathode of the light emitting diode 5 LED₅ is connected with the anodeof the light emitting diode 6 LED₆, the anode of the light emittingdiode 5 LED₅ is connected with one end of the power receiver coil L₂ andone end of the capacitor 6 C₆, the cathode of the light emitting diode 6LED₆ is connected with the other end of the power receiver coil L₂ andthe other end of the capacitor 6 C₆.

What is claimed is:
 1. A pointer-type angle measuring device withwireless power supply for lighting, including a housing, a dial (2), apointer (3) and an electronic circuit, wherein, the electronic circuitincludes a wireless power supply circuit (8) and a wireless powerreceiving and lighting circuit (9), and the wireless power receiving andlighting circuit (9) is set on the pointer (3).
 2. The pointer-typeangle measuring device with wireless power supply for lighting accordingto claim 1, wherein, the housing consists of a front cover (1) and arear cover (6), a window is set in the front cover (1), a transparentcover (4) is set on the window of the front cover (1), and the pointer(3) is set in an inner cavity of the housing inside of the transparentcover (4).
 3. The pointer-type angle measuring device with wirelesspower supply for lighting according to claim 2, wherein, the pointer (3)consists of a pointer body (3 a) and a pointer head (3 b), the pointerbody (3 a) is a housing structure with an inner cavity, the pointer head(3 b) of the pointer (3) is made of a transparent material.
 4. Thepointer-type angle measuring device with wireless power supply forlighting according to claim 3, wherein, the wireless power supplycircuit (8) includes a power transmitter coil (8 a) and a circuit board(8 b) in the wireless power supply circuit, wherein a power transmittercoil fixing base (7) is set on the inner side of the rear cover (6), thepower transmitter coil (8 a) is fixed on power transmitter coil fixingbase (7), and the power transmitter coil (8 a) is connected with thecircuit board (8 b) in the wireless power supply circuit through a wire(8 d).
 5. The pointer-type angle measuring device with wireless powersupply for lighting according to claim 4, wherein, the wireless powerreceiving and lighting circuit (9) includes a power receiver coil (9 a),a second light emitting diode (9 c) for lighting of the pointer head (3b) and a circuit board (9 b) in the wireless power receiving andlighting circuit, wherein, a power receiver coil fixing base (3 f) isset on the back of the pointer body (3 a), and the power receiver coil(9 a) is fixed on the power receiver coil fixing base (3 f).
 6. Thepointer-type angle measuring device with wireless power supply forlighting according to claim 5, wherein, a shaft hole is set in themiddle of the power receiver coil fixing base (3 f) for communicatingwith the pointer body (3 a), a bearing (3 d) is mounted in the shafthole in the middle of the pointer body (3 a) and the power receiver coilfixing base (3 f), a main shaft (3 e) is mounted in a bearing hole ofthe bearing (3 d), one end of the main shaft (3 e) is fixed on thetransparent cover (4), the other end of the main shaft (3 e) is fixed onthe rear cover (6), and the pointer (3) can rotate around the main shaft(3 e) as the axis.
 7. The pointer-type angle measuring device withwireless power supply for lighting according to claim 6, wherein, alevel bubble (3 c) is set in the inner cavity of the pointer body (3 a),a level bubble window (3 a 1) is set in the front surface of the pointerbody (3 a) of the pointer (3), and the level bubble window (3 a 1) islocated above the circuit board (9 b) in the wireless power receivingand lighting circuit.
 8. The pointer-type angle measuring device withwireless power supply for lighting according to claim 7, wherein, thedial (2) is circular, the dial (2) is set on the outer edge of thewindow in the front cover (1) in the inner cavity of the housing insideof the transparent cover (4), a circular light emitting diode fixingring (5) is set on the back of the dial (2), and a first light emittingdiode (8 c) is set on the light emitting diode fixing ring (5).
 9. Thepointer-type angle measuring device with wireless power supply forlighting according to claim 8, wherein, the wireless power supplycircuit (8) includes a microcomputer processor (IC₁), a wirelesstransmitting circuit (801), an LED driving circuit (802), anenergy-saving circuit (903) and a power circuit (804).
 10. Thepointer-type angle measuring device with wireless power supply forlighting according to claim 9, wherein, the microcomputer processor(IC₁) is HT48R063B microcomputer processor.
 11. The pointer-type anglemeasuring device with wireless power supply for lighting according toclaim 10, wherein, the wireless transmitting circuit (801) includes atriode (Q), a transmitter coil (L₁), a capacitor 5 (C₅), a resistor 2(R₂) and a resistor 3 (R₃), wherein one end of the resistor 2 (R₂) isconnected with a pin 2 of the microcomputer processor (IC₁), the otherend of the resistor 2 (R₂) is connected with a base electrode of thetriode (Q), a collector electrode of the triode (Q) is seriallyconnected with the transmitter coil (L₁) and the capacitor 5 (C₅) inturn, the other end of the capacitor 5 (C₅) is grounded, a node betweenthe transmitter coil (L₁) and the capacitor 5 (C₅) is connected to thepower supply voltage VCC of the circuit, an emitter electrode of thetriode (Q) is connected with one end of the resistor 3 (R₃), and theother end of the resistor 3 (R₃) is grounded.
 12. The pointer-type anglemeasuring device with wireless power supply for lighting according toclaim 10, wherein, the LED driving circuit (802) includes a resistor 7(R₇), a resistor 8 (R₈), a resistor 9 (R₉), a resistor 10 (R₁₀) and afirst light emitting diode, wherein, the first light emitting diodeconsists of a light emitting diode 1 (LED₁), a light emitting diode 2(LED₂), a light emitting diode 3 (LED₃) and a light emitting diode 4(LED₄), all anodes of the light emitting diode 1 (LED₁), the lightemitting diode 2 (LED₂), the light emitting diode 3 (LED₃) and the lightemitting diode 4 (LED₄) are connected to the power supply voltage VDD ofthe circuit, cathodes of the light emitting diode 1 (LED₁), the lightemitting diode 2 (LED₂), the light emitting diode 3 (LED₃) and the lightemitting diode 4 (LED₄) are respectively connected with one end of theresistor 7 (R₇), the resistor 8 (R₈), the resistor 9 (R₉) and theresistor 10 (R₁₀), and the other end of the resistor 7 (R₇), theresistor 8 (R₈), the resistor 9 (R₉) and the resistor 10 (R₁₀) arerespectively connected with pin 4, pin 3, pin 1 and pin 16 of themicrocomputer processor (IC₁).
 13. The pointer-type angle measuringdevice with wireless power supply for lighting according to claim 10,wherein, the energy-saving circuit (803) includes a capacitor 1 (C₁), acapacitor 4 (C₄), a resistor 1 (R₁), a resistor 11 (R₁₁) and a startswitch (SK), wherein, the capacitor 1 (C₁) is an electrolytic capacitor,the anode of the capacitor 1 (C₁) is connected with one end of theresistor 11 (R₁₁) and the power supply voltage VCC of the circuit, thecathode of the capacitor 1 (C₁) is grounded and connected with the otherend of the resistor 11 (R₁₁), one end of the capacitor 4 (C₄) and oneend of the resistor 1 (R₁), the other end of the capacitor 4 (C₄) isconnected with one end of the start switch (SK) and the pin 7 of themicrocomputer processor (IC₁), the other end of the start switch (SK) isconnected with the other end of the resistor 1 (R₁).
 14. Thepointer-type angle measuring device with wireless power supply forlighting according to claim 10, wherein, the power circuit (804)includes a parallel voltage-stabilizing integrated circuit (IC₂), acapacitor 2 (C₂), a capacitor 3 (C₃), a resistor 4 (R₄), a resistor 5(R₅), a resistor 6 (R₆) and a resistor 12 (R₁₂), wherein, the capacitor2 (C₂) is an electrolytic capacitor, the cathode of the capacitor 2 (C₂)is grounded and connected with the pin 5 of the microcomputer processor(IC₁), one end of the capacitor 3 (C₃), the anode of the parallelvoltage-stabilizing integrated circuit (IC₂), one end of the resistor 5(R₅) and one end of the resistor 6 (R₆), the anode of the capacitor 2(C₂), the pin 13 of the microcomputer processor (IC₁), the pin 12 of themicrocomputer processor (IC₁), the other end of the capacitor 3 (C₃),the cathode of the parallel voltage-stabilizing integrated circuit(IC₂), one end of the resistor 4 (R₄, one end of the resistor 6 (R₆) andone end of the resistor 12 (R₁₂) are connected to the power supplyvoltage VDD of the circuit, the other end of the resistor 4 (R₄) isconnected with the other end of the resistor 5 (R₅) and a referenceelectrode of the parallel voltage-stabilizing integrated circuit (IC₂),and the other end of the resistor 12 (R₁₂) is connected to the powersupply VCC of the circuit.
 15. The pointer-type angle measuring devicewith wireless power supply for lighting according to claim 10, wherein,wireless power receiving and lighting circuit (9) includes a powerreceiver coil (L₂), a capacitor 6 (C₆) and a second light emittingdiode, wherein, the second light emitting diode consists of a lightemitting diode 5 (LED₅) and a light emitting diode 6 (LED₆), the cathodeof the light emitting diode 5 (LED₅ is connected with the anode of thelight emitting diode 6 (LED₆), the anode of the light emitting diode 5(LED₅) is connected with one end of the power receiver coil (L₂) and oneend of the capacitor 6 (C₆), the cathode of the light emitting diode 6(LED₆ is connected with the other end of the power receiver coil (L₂)and the other end of the capacitor 6 (C₆).